After being treated to an intimate soiree at The Darby in New York City the previous evening, Kim Kardashian packed her bags and headed to Las Vegas for a grander bash on Saturday night (October 22). The E! reality star celebrated her 31st birthday alongside husband Kris Humphries, as well as her mother Kris Jenner, sister Khloe and her hubby Lamar Odom, with the family taking to Sin City hotel The Cosmopolitan's Marquee nightclub.